东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (11): 1615-1619.DOI: 10.12068/j.issn.1005-3026.2016.11.020

• 资源与土木工程 • 上一篇    下一篇

基于结构模态的纵向采空区群爆破动力响应

姜立春1,2, 肖康2, 吴爱祥3, 李令鑫2   

  1. (1. 华南理工大学 土木与交通学院, 广东 广州510640; 2. 华南理工大学 安全科学与工程研究所, 广东 广州510640; 3. 北京科技大学 土木与环境工程学院, 北京100083)
  • 收稿日期:2015-06-30 修回日期:2015-06-30 出版日期:2016-11-15 发布日期:2016-11-18
  • 通讯作者: 姜立春
  • 作者简介:姜立春(1968-),男,安徽全椒人,华南理工大学教授; 吴爱祥(1963-),男,湖北仙桃人,北京科技大学教授,博士生导师.
  • 基金资助:
    国家“十二·五”科技支撑计划项目(2012BAB08B02); 国家自然科学基金资助项目(51374035,51574013).

Vertical Gob Group Blasting Dynamic Response Based on Structural Modal

JIANG Li-chun1,2, XIAO Kang2, WU Ai-xiang3, LI Ling-xin2   

  1. 1. School of Civil Engineering & Transportation, South China University of Technology, Guangzhou 510640, China; 2. Institute of Safety Science and Engineering, South China University of Technology, Guangzhou 510640, China; 3. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
  • Received:2015-06-30 Revised:2015-06-30 Online:2016-11-15 Published:2016-11-18
  • Contact: WU Ai-xiang
  • About author:-
  • Supported by:
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摘要: 构建纵向采空区群离散多自由度动力响应模型,提出基于结构模态的空区群爆破动力响应分析方法.针对某金矿工程实例,对该方法进行检验分析.结果表明:该方法计算结果可直观反映采空区群内部岩体的位移与速度响应规律,揭示岩体爆破动力响应特性,与数值模拟结果趋于一致;受内部阻尼作用,岩体作减幅振动,振幅逐渐衰减至0;在爆破荷载施加位置,岩体响应强度最大,随着与爆破作用点之间距离增大,响应强度呈减弱趋势.结构模态分析方法可大幅缩短计算时间、提高计算效率,为岩体的动力响应研究提供了一种新方法.

关键词: 采空区群, 结构模态, 动力响应, 模型, 爆破荷载

Abstract: Discrete multi-freedom-degree dynamic response model of vertical gob group was developed. Based on structural modal, a new method analyzing gob group blasting response was presented. In combination with a typical engineering problem, verification and discussion were made for the method. Results indicate that the method can directly reflect gob group rock mass response law of displacement and velocity, and describe its blasting response characteristics. The results are in accordance with that of numerical simulation. For internal damping, rock mass vibration damping, the amplitude decays to zero gradually. Rock mass where the blasting loads act on has the strongest response strength. With an increase in the distance between rock mass and the blasting position, response strength of rock mass weakens. The method can greatly decrease computation time and increase calculation efficiency and it provides a new direction for dynamic response analysis of rock mass.

Key words: gob group, structural modal, dynamic response, model, blasting load

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